<!-- 权限管理->角色列表 -->
<template>
  <div>
    <!-- 面包屑导航区域 -->
    <el-breadcrumb separator-class="el-icon-arrow-right">
      <el-breadcrumb-item :to="{ path: '/home' }">首页</el-breadcrumb-item>
      <el-breadcrumb-item>权限管理</el-breadcrumb-item>
      <el-breadcrumb-item>角色列表</el-breadcrumb-item>
    </el-breadcrumb>
    <!-- 卡片视图 -->
    <el-card>
      <!-- 添加角色按钮 -->
      <el-row>
        <el-col>
          <el-button type="primary" @click="addDialogVisible = true">添加角色</el-button>
        </el-col>
      </el-row>
      <!-- 角色列表区域 -->
      <el-table :data="rolesList" stripe border :row-key="getRowKey"
        :tree-props="{children: 'children11', hasChildren: 'hasChildren'}">
        <!-- 展开列 -->
        <el-table-column type="expand">
          <template slot-scope="scope">
            <el-row v-for="(item1, i1) in scope.row.children" :key="item1.id"
              :class="['bdbottom',i1 ===0 ? 'bdtop' : '','vcenter']">
              <!-- 渲染一级权限 -->
              <el-col :span='5'>
                <el-tag @close="removeRightById(scope.row,item1.id)" closable>{{item1.authName}}</el-tag>
                <i class="el-icon-caret-right"></i>
              </el-col>
              <!-- 渲染二级及以后的权限 -->
              <el-col :span='19'>
                <!-- 通过for循环嵌套渲染二级权限 -->
                <el-row v-for="(item2, i2) in item1.children" :key="item2.id"
                  :class="[i2 ===0 ? '' : 'bdtop','vcenter']">
                  <el-col :span='6'>
                    <el-tag type="success" @close="removeRightById(scope.row,item2.id)" closable>{{item2.authName}}
                    </el-tag>
                    <i class="el-icon-caret-right"></i>
                  </el-col>
                  <!-- 三级权限 -->
                  <el-col :span='18'>
                    <el-tag type="warning" v-for="item3 in item2.children" :key="item3.id"
                      @close="removeRightById(scope.row,item3.id)" closable>
                      {{item3.authName}}
                    </el-tag>
                  </el-col>
                </el-row>
              </el-col>
            </el-row>
            <!-- <pre>{{scope.row}}</pre> -->
          </template>
        </el-table-column>
        <!-- 数据列 -->
        <el-table-column prop="roleName" label="角色名称"></el-table-column>
        <el-table-column prop="roleDesc" label="角色描述"></el-table-column>
        <el-table-column label="操作" width='400'>
          <template slot-scope='scope'>
            <el-button type="primary" icon="el-icon-edit" @click="showEditDial(scope.row.id)">编辑</el-button>
            <el-button type="danger" icon="el-icon-delete" @click="removeUserById(scope.row.id,scope.row.roleName)">删除
            </el-button>
            <el-button type="warning" icon="el-icon-setting" @click="showSetRightDialog(scope.row)">分配权限</el-button>
          </template>
        </el-table-column>
      </el-table>
    </el-card>
    <!-- 添加角色的对话框 -->
    <el-dialog title="添加用户" :visible.sync="addDialogVisible" width="50%" @close="addDialogClosed">
      <!-- 内容主体区域 -->
      <el-form :model="addForm" status-icon :rules="addFormRules" ref="addFormRef" label-width="100px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="addForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述" prop="roleDesc">
          <el-input v-model="addForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="addDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="addUser">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 修改角色的对话框 -->
    <el-dialog title="修改用户" :visible.sync="editDialogVisible" width="50%" @close="editDialogClosed">
      <!-- 内容主体区域 -->
      <el-form :model="editForm" status-icon :rules="addFormRules" ref="editFormRef" label-width="100px">
        <el-form-item label="角色名称" prop="roleName">
          <el-input v-model="editForm.roleName"></el-input>
        </el-form-item>
        <el-form-item label="角色描述">
          <el-input v-model="editForm.roleDesc"></el-input>
        </el-form-item>
      </el-form>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="editDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="editUserInfo">确 定</el-button>
      </span>
    </el-dialog>
    <!-- 分配权限的对话框 -->
    <el-dialog title="分配权限" :visible.sync="setRightDialogVisible" width="50%" @close="setRightDialogClosed">
      <!-- 树形控件 -->
      <el-tree :data="rightslist" :props="treeProps" show-checkbox node-key="id" default-expand-all
        :default-checked-keys="defKeys" ref="treeRef"></el-tree>
      <!-- 底部区域 -->
      <span slot="footer" class="dialog-footer">
        <el-button @click="setRightDialogVisible = false">取 消</el-button>
        <el-button type="primary" @click="allotRights">确 定</el-button>
      </span>
    </el-dialog>
  </div>
</template>

<script>
  export default {
    data() {
      return {
        // 所有角色列表数据
        rolesList: [],
        // 添加角色的表单数据对象
        addForm: {
          roleName: '',
          roleDesc: ''
        },
        // 控制添加角色对话框的显示与隐藏
        addDialogVisible: false,
        // 添加用户的表单数据的验证规则对象(修改也用的这个)
        addFormRules: {
          roleName: [
            { required: true, message: '请输入角色名', trigger: 'blur' },
          ],
        },
        // 查询到的用户信息对象
        editForm: {},
        // 控制修改用户对话框的显示与隐藏
        editDialogVisible: false,
        // 控制修改权限对话框的显示与隐藏
        setRightDialogVisible: false,
        // 报错接收的所有权限数据
        rightslist: [],
        // 树形控件的数据绑定
        treeProps: {
          children: 'children',
          label: 'authName'
        },
        // 默认选中的节点id数组
        defKeys: [],
        // 当前即将分配权限的角色id
        roleId: ''
      };
    },
    created() {
      this.getRolesList()
    },

    components: {},

    computed: {},

    // mounted: {},

    methods: {
      // 获取所有角色列表
      async getRolesList() {
        const { data: res } = await this.$http.get('roles')
        if (res.meta.status !== 200) return this.$message.error('获取权限列表失败')
        this.rolesList = res.data
      },
      // 监听添加用户对话框的关闭事件
      addDialogClosed() {
        this.$refs.addFormRef.resetFields()
      },
      // 点击按钮，添加角色
      addUser() {
        this.$refs.addFormRef.validate(async valid => {
          if (!valid) return;
          const { data: res } = await this.$http.post('roles', this.addForm)
          if (res.meta.status !== 201) return this.$message.error('添加用户失败！')
          this.$message.success('添加用户成功！')
          // 隐藏用户的对话框
          this.addDialogVisible = false
          this.getRolesList()
        })
      },
      // 点击修改按钮修改当前行的用户信息事件
      async showEditDial(id) {
        const { data: res } = await this.$http.get('roles/' + id)
        if (res.meta.status !== 200) return this.$message.error('修改失败！')
        this.editForm = res.data
        this.editDialogVisible = true
      },
      // 监听修改角色对话框的关闭事件
      editDialogClosed() {
        this.$refs.editFormRef.resetFields()
      },
      // 修改用户信息并提交
      editUserInfo() {
        this.$refs.editFormRef.validate(async valid => {
          if (!valid) return this.$message.error('请检测你的内容是否正确！')
          const { data: res } = await this.$http.put('roles/' + this.editForm.roleId, { roleName: this.editForm.roleName, roleDesc: this.editForm.roleDesc })
          if (res.meta.status !== 200) return this.$message.error('更新失败！')
          // 关闭对话框
          this.editDialogVisible = false
          // 刷新数据列表
          this.getRolesList()
          this.$message.success('更新成功！')
        })
      },
      // 根据id删除对应的用户信息
      async removeUserById(id, roleName) {
        // 触发弹框
        const confirmResult = await this.$confirm('此操作将永久删除用户：' + roleName + '，是否继续?', 'Warning', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
        // console.log(confirmResult)
        // 如果用户确认删除，则返回值为字符串 confirm
        // 如果用户取消删除，则返回值为字符串 cancel
        if (confirmResult !== 'confirm') return
        const { data: res } = await this.$http.delete('roles/' + id)
        if (res.meta.status !== 200) return this.$message.error('删除失败！')
        this.$message.success('删除成功！')
        this.getRolesList()
      },
      // 根据id删除对应的权限
      async removeRightById(role, rightId) {
        // 弹窗提示用户
        const confirmResult = await this.$confirm('此操作将永久删除该权限，是否继续?', 'Warning', {
          confirmButtonText: '确定',
          cancelButtonText: '取消',
          type: 'warning'
        }).catch(err => err)
        // 如果用户确认删除，则返回值为字符串 confirm
        // 如果用户取消删除，则返回值为字符串 cancel
        if (confirmResult !== 'confirm') return
        const { data: res } = await this.$http.delete(`roles/${role.id}/rights/${rightId}`)
        if (res.meta.status !== 200) return this.$message.error('删除权限失败')
        this.$message.success('删除权限成功')
        // this.getRolesList()
        role.children = res.data
      },
      // 展示分配权限的对话框
      async showSetRightDialog(role) {
        // 保存获取的角色id
        this.roleId = role.id
        // 获取所有权限的数据
        const { data: res } = await this.$http.get('rights/tree')
        if (res.meta.status !== 200) return this.$message.error('获取权限数据失败！')
        this.rightslist = res.data
        // console.log(role)
        // 递归获取三级节点id
        this.getLeafKeys(role, this.defKeys)
        this.setRightDialogVisible = true
      },
      // 通过递归，获取角色下所有三件权限的id,并保存到defKeys中
      getLeafKeys(node, arr) {
        // 判断是否为三级节点
        if (!node.children) return arr.push(node.id)
        node.children.forEach(item =>
          this.getLeafKeys(item, arr))
      },
      // 监听分配权限的对话框，关闭时重置defKeys数组
      setRightDialogClosed() {
        this.defKeys = []
      },
      // 点击为角色分配权限
      async allotRights() {
        const keys = [
          ...this.$refs.treeRef.getCheckedKeys(),
          ...this.$refs.treeRef.getHalfCheckedKeys()
        ]
        // console.log(keys);
        const idStr = keys.join(',')
        const { data: res } = await this.$http.post(`roles/${this.roleId}/rights`, { rids: idStr })
        if (res.meta.status !== 200) return this.$message.error('角色权限添加失败')
        this.$message.success('角色权限添加成功')
        this.getRolesList()
        this.setRightDialogVisible = false
      },
      // 
      getRowKey(row) {
        return row.id
      }
    }
  }

</script>
<style lang='less' scoped>
  .el-tag {
    margin: 10px;
  }

  .bdtop {
    border-top: 1px solid #eee;
  }

  .bdbottom {
    border-bottom: 1px solid #eee;
  }

  .vcenter {
    display: flex;
    align-items: center;
  }
</style>